The thermostatically controlled DEWALT DXH185KT Forced Air Heater burns at 185,000 BTU per hour and can be used with kerosene, diesel, fuel oil, or JP-8 fuels. With a 13.8-gallon tank, you can get 9.5-hours of run time and the ability to heat up to approximately 4,000 square-feet of space (based on average insulation, ceiling height, and desired temperature rise). Equipped with a thermostat, the heating element cycles on and off to maintain the set temperature. The continuous electronic ignition is always present as a source of ignition for unburned fuel, reducing the ability for fuels to pool and collect in a dangerous manner. The recessed controls are designed to reduce the risk of damage on the jobsite. The rugged two-piece barrel makes cleaning and maintenance easier and safer.